Carrying case



'April 9, 1946. J. A. oBr-:RMAIER CARRYING CASE Filed April l0, 1943 f6y 27 z8 fTZ.

Patented Apr. 9, 1946 UNITEDQSTATE CARRYING CASE Y John A. OberxnaienRiver Forest, Ill. Y f, ",Appucatidn April 1o, 1943, seriai No. 482,631

v2 claims. (o1. `1v1-s4) My invention relates, generally, to electricalmeasuring apparatus and it has particular relation to pyrometers andcarrying cases for the same. v l

, A pyrometer of the type and character of the presentinvention is aprecision instrument although it is intended to beused commerciallyoutside of the laboratory. That is. it is intended for use in industrialplants in any locations'where it is desired 15o-measure the temperatureof machines, parts -'of machines, material beingprocessed and the like.1 f

It isv desirableA to provide -carrying means forr such an instrumentwhich will safeguard it and protect it so that its calibration willremain substantially unchanged.` Y

An' object of the inventionl is to provide lfor carrying a pyrometerincluding a measuring instrument of theDArsonval type vand for maintaining the coil of the instrument short circuited while it is beingcarried so as to dampen its vibration.

Another object of. theinvention is toprovide flexible means forinterconnecting a thermocouple andl the measuring instrument bothmechanically and electricallyso as to permit independent movement of thethermo-couple with respect to the measuring instrument extent. Y l vOther objects of the inventionwill, in part, be obvious and in partappear hereinafter.

For a more complete understanding of the nature and scope of myinventionyreference may be had to the following description taken,together with the accompanying drawing, in which:

Figure 1 is a top plan view of the pyrometer of the present inventionshown in a carrying case with the cover open;

Figure 2 is a detail sectional view taken along the line 2-2 of Figure1, the extension arms, shown in Figure 1, being omitted; and

Figure 3 is a detail sectional view taken along the line 3-3 of Figure2.

Referring now particularly to Figures 1 and 2 of the drawing it will beobserved that the reference character I designates a measuringinstrument which is preferably of the DArsonval moving coil type. Theinstrument IU is provided with a handle II which is suitably constructedto facilitate its being grasped firmly in the hand.

' When not in use the instrument I0 is arranged to be mounted in acarrying case, shown generally at I2. The carrying case I2 includes acover I3 which is suitably hinged to the lower portion of the case I2.The carrying case I2 is to a limited lll provided with a centrallylocated raised -portion I4 having a cylindrical-opening I 5 thereinforreceiving the instrument I0, as shown; Apartition of the raised portionIII is provided with a slotted opening I6 through which the handlefl Iextends. The instrument I0 and handle I I fit fairly closely in thecylindrical opening I and slot I6so that, when the cover I3 is closed,the instrument I8 is held fairly tightly in position to move to anygreat extent.

It is highly desirable to prevent vibration of the pointer I I of theinstrument I0 so that its accuracy will remain substantially unimpaired.For this purpose means are provided for short circuiting the operatingcoil of the instrument I0, which causes the pointer I1 to move across-the scale, at all times that the instrumentIIl is in the position shownin the drawingin the carrying case I2.

At the rear of the instrument Ill there are pro- `vided two terminalblocks I8, one/for each terminal of the coil of the instrument I 0.4These terminal blocks- I8 are provided to'make connections with certainextensions Which connect to s the thermo-couple that will be describedhereinafter. For -this purpose each lof the terminal blocks I8 isprovided With a centrally located -f U-shaped portion I9, as shown moreclearly in Figure 3 of the drawing.

With a view to short circuiting the terminal blocks I8 and thereby thecoil of the instrument I0, a short circuiting clip 20 ofsuitablelccnducting material is provided. As 'shown in FigureA 3 of thedrawing, the clip 20 is generallyv U-shaped and is provided withinturned resilient end portions 2I for making good contact engagementwith the ends of the terminal blocks I8. Screws 22 are provided forholding the terminal clip 20 to the bottom of the carrying case I 2.

It will now be apparent that, when the instrument I I) is placed in thecarrying case I2 in the position shown in Figures 1 and 2 of thedrawings, the terminal blocks I8 will at the same time engage the shortcircuiting clip 20. As a result the pointer I'I of the instrument I0will have its tendency to vibrate dampened because the coil of theinstrument I0 is short circuited. Not only does the clip 20 shortcircuit the terminal blocks I8 but also, since the terminal blocks I8are resiliently gripped by the inturned end portions 2I, the instrumentI0 is further held securely in place in the case I2.

In order to use the instrument I 0 for measuring the temperature of apart of a machine or portion of material being processed the instruandisnot freeV ment I is removed from the case IZ. It is turned upside downso as to facilitate attachment thereto of an extension, shown generallyat 26, which normally is carried in the case I2 in the position Ashuwnin Figure 1 of the drawing. This form of extension 26 is rigid and isprovided with terminals 21 Vand 28, which are adapted to engage theterminal blocks I8 of the instrument I0. The

26, as is' more fullyisetjorth in my copending, application Serial No.482,632, filed April 10, 1943.

As set forth in my copending application, the,` terminals 21 and 28 arearranged to interi-lt in the U-shaped portion I9 of each of the terminali i terminal 21 is provided with a knurled extension Y v 2,9 Whiclrisvtmeatdedlyrrnounted onthe.V eitension blocks I8 and, by turning theknurled portionY 29,

the terminals 21, 28 are securely'clamped tothe terminal blocks I8. I e

that 'all matters shown in the accompanying At the opposite end of theextension 2G there i is provided a thermo-couple 30 which may beenreneei several designs. depending unen the use. te Whien; it is. tete.nut and the temperatire, that t0. be.v measured... It will. beunderstood. that` the tlieriimA- .=.nip.1eiY 30 be rotated.. with..resneet-to the risidnortienei the. extension 26 tlneusii.` s,Considerable are. and niet it. may be t hei n anir desired pesitionin.this archi! a. clamp nnilf, i

Another forni Qi: entensien. fer eonneetionto the instrument I0 is sho ngenerally at. 33.. This ex.tensien;3.1,` includes a, eenneeting armS'l'whieh is. shown by breit asbeine locatedunder.- neath. tlie.extension 26m. tnecase i2. Thev eenneetins erin 314.- prqvidesi; withterminals 3.5 and.

: which. .are identical. with; the terminals.; 2.1 and 28..prevuslrdeseribed.. The.. terminals 35 and 33 een be.: eenneeted .tothe. terminalv blocks i8..

lne nnderstod manine thermo-.couple Uncanfbe swung, through.. axsuitablearc withV reference te. theextension 3s: to. adapt it fgorfvar.-

ious measuring positions. Thermo-couple 31 can be held in place by meansof a clamp nut 4I.

The slotf43 in the central raised portion I4 is provided for receiving aCalibrating thermometer. This is employed for vsetting the pointer I1vof the instrument I0 at the temperature on the scale corresponding tothe ambient temperature.

Recesses 44, 45 and 46 are provided in the raised portion I4 of thecarrying case I2 for receiving various Atypes ofl thermo-couples whichare adapted to. be interchangeably received by the extension arms 26 and38.

Since certain changes can be made in the foregoing construction anddifferent embodiments of lthe'invention can be made without departingfrom thek spirit and scope thereof, it is intended drawingand-:described hereinbefore shall be interpreted, as illustrative andnot in a limiting sense.v

Iclaim as my; invention; Y

1. A carrying ease. for removably; reeeivinef a portable instrument;having an indicator providedV with a moving coil, a pointer, and a pair.of extermal terminal blocks connected. to .saidv coil and projectingfrom said instrument; said casel hav.- ing: therein arecesssubstantially conforming to the; instrument; adapted to receiveand'kr restrainy it against: appreciable .transuersei movement in the;casearia a, contact; olip disposed and adaptedA to. engage andshortzfcircuitfthe terminal blocks of an instrument in said recesswhleialso restrain-k ing the,- instrumentagainst; transverse. movementinsaid` casev the. latter hail-ing; a'. cover disposed when inf closed.nositiontorestrainthe: instrument against upward movement in said recess2V. A.. carryingcaseror removably receivinga portable. instrument.having an indicatorprovided witzh a. moving-fcoil,v av pointer-,rand a.Vpair of; rear-v Waidl'y projentingf; externa-1 terminalfblocksv con-vvnected to `saidcoil.; saidcase having therein. a recess substantiallyconforming to the instru-v ment and-an opening substantially U-shaped.spring.Contactclip.;aty the bottom ofl said recess; disposedlkandadapted.: to/ receive .thel ter.-

minal blockzsof. aninstrument. placed therein with its rearward wall;downwardg. said: recess. and* said.

clip. in.. cooperation restraining the instrument.

against objectionable transverse movement in" the caseand short:circuiting said terminals, the case having a ccverdis-nosed when; inclosed. position to;l restrain1 the .instrument against:- upwardf movementin said; recess.

01m A.. OBERMAI'ER

